html,body,.content{
    max-width: 100%;
    max-height: 100%;
    margin:0;
    padding:0;
    overflow: hidden;
}
.content{
    
    width: 16rem;
    
    height: 28.4rem;
    
    background: url('../images/background.png') no-repeat 0 / 100%;
        position: relative;

}
.button{
    width:5rem;
    height:1.8rem;
    background: url('../images/button.png') no-repeat 0 / 100%;
    position: absolute;
    top:20.3rem;
    left:50%;
    margin: -2.5rem;
}